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The intravenous dose causing 50% of opioid-naive experimental subjects to die (LD 50) is "3 mg/kg in rats, 1 mg/kg in cats, 14 mg/kg in dogs, and 0.03 mg/kg in monkeys." [ 98 ] The LD 50 in mice has been given as 6.9 mg/kg by intravenous administration, 17.5 mg/kg intraperitoneally, 27.8 mg/kg by oral administration. [ 99 ]
Cats will adjust their eyes during the day, allowing less light to filter in, while their pupils will expand at night to allow for more light, Purina reports. Feline eyes also have more "rods ...
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Cats have unique personalities, temperaments, and tendencies and will communicate with you in a way that feels best to them. Chirping is normal, but if your cat doesn’t chirp at all that doesn ...
Cats have an acute sense of smell, due in part to their well-developed olfactory bulb and a large surface of olfactory mucosa, about 5.8 cm 2 (0.90 in 2) in area, which is about twice that of humans. [79] Cats and many other animals have a Jacobson's organ in their mouths that is used in the behavioral process of flehmening. It allows them to ...
Image credits: jjky665678 It turns out that cats have their own analogue of a smile - they simply blink slowly when they look at their owners. And scientists who have studied thousands of cat ...
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Human activities can also be detrimental, and have threatened numerous bird species with extinction (hunting, avian lead poisoning, pesticides, roadkill, wind turbine kills [285] and predation by pet cats and dogs are common causes of death for birds).